PGGT1B and hepatocellular carcinoma: Han G refers to the different forms of GGT I mRNA in the human fetal liver, hepatocellular carcinoma tissues, and placenta as isoforms A, B, and C, respectively, and hepatocellular carcinoma occurrence is closely related to the conversion of GGT I mRNA from subtype A to subtype B. GGT I mRNA helps in the diagnosis of hepatocellular carcinoma [79].